65 строки
1.6 KiB
Python
65 строки
1.6 KiB
Python
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# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License.
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from timeit import default_timer
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from datetime import timedelta
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class Timer(object):
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"""Timer class.
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Original code: https://github.com/miguelgfierro/codebase
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Examples:
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>>> import time
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>>> t = Timer()
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>>> t.start()
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>>> time.sleep(1)
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>>> t.stop()
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>>> t.interval < 1
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True
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>>> with Timer() as t:
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... time.sleep(1)
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>>> t.interval < 1
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True
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>>> "Time elapsed {}".format(t) #doctest: +ELLIPSIS
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'Time elapsed 1...'
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"""
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def __init__(self):
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self._timer = default_timer
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self._interval = 0
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self.running = False
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def __enter__(self):
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self.start()
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return self
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def __exit__(self, *args):
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self.stop()
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def __str__(self):
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return "{:0.4f}".format(self.interval)
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def start(self):
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"""Start the timer."""
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self.init = self._timer()
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self.running = True
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def stop(self):
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"""Stop the timer. Calculate the interval in seconds."""
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self.end = self._timer()
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try:
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self._interval = self.end - self.init
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self.running = False
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except AttributeError:
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raise ValueError(
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"Timer has not been initialized: use start() or the contextual form with Timer() as t:"
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)
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@property
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def interval(self):
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if self.running:
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raise ValueError("Timer has not been stopped, please use stop().")
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else:
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return self._interval
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